From Longman Dictionary of Contemporary EnglishGod rest his/her soulGod rest his/her soul (also God rest him/her) spoken old useADMIRE used to show respect when speaking about someone who is dead →godGod rest his/her soulGod rest his/her soul (also God rest him/her) old-fash used to show respect when speaking about someone who is dead →GodGod rest his/her soulGod rest his/her soulMXDEADused when you mention the name of someone who is deadMy father, God rest his soul, died here at Vernison Hall. →soul